Resuscitator



Dec. 23, 1930. D. N. LAMBERT RE SUSCITATOR Filed Sept. 12, 1925 3Sheets-Sheet 1 fla -dd A? Lam f abtoznua Dec. 23, 1930. D. N. LAMBERTRESUSCITATOR Filed Sept. 12, 1925 5 Sheets-Sheet 2 flared Lamepf Dec.23, 1930. D. N. LAMBERT RESUSC ITATOR 3 Sheets-Sheet 3 Filed Sept. l2,'1925 attoznu Patented Dec. 23, 1930 UNITED STATES 7 DAVID n. namnnrt'r',or Bnooxmm, NEW yonx BESUSCITATOR Application filed September 12, 1925.Serial Ho. 56,025.

This invention relates to a resuseitator or pulmotor, and the objects ofthe same are, to provide a comparatively simple and; com.- pactportableapparatus embodying-both electrically driven and manually operativemeans to adapt the same for use either where elec: trical current isavailable or inmines and other places distant from electricalinstallations; to provide means for regulating the operation of theapparatus to accurately conform to the rate of respiration of patientsof various ages; to provide purifying means 7 for the air, oxygen orother gas or gas mix: ture supplied to the patient, and also means foreffecting a proportionate mixture ofgas and atmospheric air or. ofdifi'erentgases'in the treatment of patients variously affected; and to,generally improve devices of the class specified to render themconvenient and read: 2 ily and expeditiously serviceable for treatmentin cases of asphyxiation and gas pois: oning or for other purposeswherea resuscitator may be practically used.

The invention consists in the preferred construction and arrangement ofthe. sev eral parts which will be more fully herein: after described andclaimed.

In the drawings:

Fig. 1 is a side elevation of a resuscitator or pulmotor embodying thefeatures of the invention and showing the applicator or tube brokenaway.

a Fig. 2 is a top plan view of the resuscitator or pulmotor. i

Fig. 3 is a longitudinal vertical section on the line 3-3, Fig. 2,showingthe cover for part of the mechanism removed.

Fig. 4 is a horizontal section on the line H, Fig. 3.

Fig. 5 is a transverse'vertical section of the purifier embodied in theapparatus.

Fig. 6 is a sectional elevation of a part of the operating mechanism,showing the means for changing from power to a manual drive.

Fig. 7 is a transverse vertical section taken on the line 7757, Fig. 6.

The numeral 5 designates a base of suit-..

able construction, preferably formed, of metal, and having corner. legs6,. Qn one end of the base 5v is mounted an electric motor 'I embodyingthe usual armature shaft 8 pro: vided with a grooved belt wheel 9 on itsrear end, as clearly shown by Fig. 2. switch 15 and transformer 10 and acontroller 11 provided. with the usual projecting handle or switch lever12'are associated with the electric motor 7 Electrical wire connections13 provided with a terminal plug 14 of'the usual typeextend beneath thebase 5 to the transformer and switch. The motor '7, transformer 10,controller 11 and electrical wire connections 13 are features common inthe electrical art and are utilized in the present instance simply asoperative accessories, the transformer 10 adapting the motor 7 to eitherD. or A. C. current, the changebeing readily accomplished through theactuation of an ordinary switch 15 having an upwardly projecting switchknob 16. At the same end 7 or the base 5 on which the motor 7 is mountedand projecting rearwardly from a suitable upright 17 is a'stub shaft 18,on which is mounted a sprocket wheel 19 having a crank handle 20connected thereto for manual op- .5.

eration. On the opposite extremity of the base is mounted a rotary pump21 having a shaft 22 projecting outwardly beyond itsopposits ends 23 and245. t It will be understood that the pump has the usual form of rotary9 piston therein and is in all respects similar to the usual form'ofpumps which'may be readily obtained in the market. The projecting shaltextremities 22 of the pump are mounted in suitable bearings 25. Agrooved band wheel 26 of larger diameter than the band wheel or pulley 9on the motor shaft and in longitudinal alinement with the latter bandwheel is fixed on the rear projecting extremity 22 of the shaft of thepump. Said band .9 wheelor'pulley has a rearwardly'e xtending hub 27,which is angular in cross-section, the function of which will bepresently'explained. Secured to the rear portion of the base is anangularly shaped bracket 28 (Figurefi), 95. which projects outwardlyfrom the one side of the. base and has a vertical member 29 to which isfixed a studBO which projects toward the hub 27 of theband wheel 26 inconcentric alinement at its inner end with the end of the too rearextremity 22 of the pump shaft. The latter extremity 22 of the pumpshaft, l1OW- ever, as shown by Fig. 6 is not connected to the stud 30and, when the operating mechanism is to be driven by electric power, asprocket wheel 31 having a hub 32 is rotatably mounted on the stud 30and held thereon by a key 33, which extends through a slot 34 in theforward end of the said stud. The sprocket wheel 31 is materiallysmaller in diameter than the sprocket wheel 19 of the manual drivingmechanism, and continually trained over the sprocket wheels 19 and 31 isan endless chain belt 35. When the improved resuscitator or pulmotor isused in places where electric current is not available, the key 33 iswithdrawn from the inner end of the stud and the sprocket wheel 31 withits hub 32 is pushed forwardly over the angular hub 27 of the band Wheelor pulley 26, the hub 32 of the sprocket wheel 31 having an angularopening 36 therethrough corresponding to the contour of the hub 27.lVhen the sprocket wheel 31 is mounted on the hub 27 of the pulley 26the chain belt 35 is caused to rotate the pump shaft 22 upon rotation ofthe sprocket wheel 19 through the medium of the crank handle 20. Afterthe sprocket wheel 31 and its hub 32 are engaged with the hub 27 of theband wheel or pulley 26, the key 33 is reversed and passed through atransverse aperture 37 in the rear extremity 22 of the pump shaft tohold the hub 32 of the sprocket wheel 31 on the hub 27 of the pulley 26,as shown by Fig. 6. When the resuscitator or pulmotor is used inlocalities or places Where electric current is available, the sprocketwheel 31 is pushed over onto the stud 30 and secured against removaltherefrom, as shown in broken lines in Fig. 6. In changing the operatingmechanism from a manual to an electrical drive, it will be noted that nodisturbance of the connection between the grooved band and belt wheels 9and 26 is necessary, the said connection being in the form of an endlessbelt 38, and the change from one form of drive to the other may bereadily accomplished. The pump has an oil feed 39 comprising the usualform of oil cup 40, it being preferred to use a sight oil feed. To thetop of the outer portion of the pump an angular inlet nipple 41 is alsosecured, and connected to the opposite portion of the pump top is anoutlet connection 42.

The improved resuscitator or pulmotor also includes a purifier 43, inthe form of an upright cylinder clearly shown by Fig. 5 and having inthe lower portion thereof a screen or strainer 44 and also having anupper outlet connection 45. A screw-threaded opening 50 is formed in thetop of the purifier or cylinder 43 which opening is closed by aremovable screw cap 46, to which is attached an angular inlet nipple 47having a valve 48.

The outlet connection 42 from the pump 21 is connected to the lowerportion of the purifier or cylinder 43 below the screen or strainer 44,and suitable absorbent material, such as absorbent cotton, is placedabove this screen or strainer as at 49. The absorbent material may beplaced within the purifier or cylinder 43 through the opening 50 whenthe screwthreaded cap 46 is removed, and this material will take up alloil particles or greasy matter that may come through the outlet 42 ofthe pump 21 with the air or gas that is forced into and through the saidpurifier or cylinder 43 by the pump, so that the air or gas passing fromthe purifier by way of the outlet pipe 45 will be free of contaminationby oil or other matter that may be taken up thereby in the pump. Theangular inlet nip ple 47 with its valve 48 provides means for admittinggas of any desired or proper kind into the upper end of the purifier, tocommingle or be mixed with the air or gas that is forced into the lowerportion of the said purifier by the pump and rising to the upper of thesaid purifier to be liberated through the outlet 45. By this means thescope of treatment of the improved resuscitator or pulmotor is increasedand the same is thereby adapted for administering various combinationsof gas and air. It will also be understood that, if desired, anypreferred medicament may be held within the purifier and carried, forinstance, by the absorbent cotton or other means.

Mounted on the base 5 is a main controll ing valve 51, consisting of asuitable casing 52, as shown in detail by Figs. 3 and 4, hav ing at theend nearest the purifier or cylinder 43 an inlet 53 adjacent the top 54thereof, for

attachment to the outlet pipe 45 from the said purifier or cylinder. Onthe bottom 55 of the casing 52 a valve seat 56 is mounted and formedwith three ports or passages 57, 58 and 59. The port or passage 57 has arearwardly projecting pipe 60 connected thereto which serves as theexhaust, and respectively connected to the ports or passsages 58 and 59are forwardly projecting nipples 61 and 62, to which flexible tubes orpipes 63 are attached for delivery to the patients of the mixture of airor gas, or gas alone, or mixture of gases, in accordance with thetreatment desired. The tubes or pipes connected to the two nipples 61and 62 are intended for treatment of two patients at one time. Only onetube 63 is shown and that is shown as applied to the nipple 61, but itwill he understood that a similar tube or applicator may be applied tothe nipple 62. Over the valve seat 56 a longitudinally reciprocating orslide valve 64 is mounted and has an intermediate chamber 65, preferablyof the shape shown by Fig. 3, and which serves to alternately connect orestablish communication between the ports or passages 58 and 59 toalternately permit the contents of the cas ing 52', coming by way of thepipe 45, to flow into the said ports 58 and 59. The valve 64 is securedto-the intermediate portion of a slide rod 66mounted in bearings 67rising-from the bottom of the casing 52 at suitable distances fromopposite ends of the valve seat 56. A pitinan 68 extends between asuitable coupling clip or member 69. secured to the rod 61 and the crank70 of a vertical crankshaft 71 having its lower end mounted, in a footbearing 72 on the bottom 55 ofthe casing 52 and its upper end rotatablein an' opening in thetop 54, a packingor gland 73 being mounted in saidOPGDIIIU' around the said shaft 71 so as to prevent leakage of the eon:tents of the casing 52 at this point and also to provide a-stablebearing for the shaft. On

the upper end of the shaft 71 at a suitable distance abovethe top54aworm wheel 74 is secured. A; sleeve 75 is longitudinally adjustable onthe forward extremity 22 of the pump shaft adjacent the worm wheel 74and carries worms 76, 77and 7 8 of different pitch..

The sleeve 75 may be so adjusted on the pump shaft as to cause any ofthe worms 76, 77 or 78 carried thereby to engage the worm wheel 74 andvary the rate of the reciprocation of the valve 64 controlling the ports57, 58 and 59 of the valve seat and the supply of'air, air and gas orgas alone or mixture of gases passing out through the nipples 61 and 62in accordance with the age and normal respiration of the patienttreated.

The sleeve 75 is readily shiftable lengthwise of the forward shaftextremity 22 of the pump to bring the different worms 76. 77 and 78 intomesh with the Worm wheel 74, the said sleeve 75 being held in adjustedposition by a set screw 79. It will therefore be understood that thesleeve 75 with the worms thereon regularly rotates with the shaftextremity 22. The forward end of the shaft extremity is 5. shown asmounted in an upright bearing projection 80 at the front of the machine.Non mally the upwardly projecting extremity of the shaft 71, the pinionor worm wheel 74 and the sleeve 75 with its worms are enclosed by ahinged cover or lid 81, which is slottedin the front and rear as at 82to fit over the forward projecting extremity of the pump shaft inadvance and in rear of the said sleeve. The top-54 of the casing 52 isalso formed with an upstruck portion 83 through which is formed anopening 84 normally covered by a hinged lid 85, a transparent plate 86being held at the underside of the rim of the opening 84, so that, byraising the lid 1 the interior of the casing and the valve 64 may beexamined or inspected.

The operation of the improved device very simple. After it has been setfor operation by either power or manual drive, a suite able connectionfor air, air and gas, or gas alone is madewith thenipple 41 and the pumpin its operation forces the air or air and gas through thepipe 42 intothe lower end of the purifier or. cylinder 43 below the screen orstrainer 44, and the air or gas then passes. up

through the said purifier and any deleterious matter that may be carriedthereby is retained within the purifien: The purified air or. gas orairand gas mixture, as the case may be, passes off through the pipe 45 intothe valve casing 52 and is liberated through either" one or both ofthe'ports 58 and 59 to the patient or patients treated, a regularexhaust "from the patient being effected through theport 57 and pipe 60.Prior to starting theimachine the sleeve 75 will be adjusted to bringthe proper worm 7 6, 77 or 78 into engagement with the worm wheel 74 inaccordance with the rapidityof respiration ofthe patient or patients.This adjustment of the WOIIDSTHdY be made without displacing orin anyW186 disorganizing the slide valve structure, and moreover, when twopatients, for instance, are treated one time, they will be assumed tohave thesame normal respiratory rapidity, and when only one patient istreated, the un used nipple 61 or 62 will be suitablyclosed for the timebeing or it may be left open and the air or gas liberated into thesurrounding atmosphere.

The nipple 47 is adapted to have a connection thereto from a source ofsupply of the particular gas that may be'desired to be mixed with theair or gas or gasalone com- .ing from the pump into the purifieigas formitted to enter the upper. end of the purifier and commingle or be mixedwith the air. orgas or gas alone that is beingsupplied to the purifierfrom thepump and the mixture then passes out through the pipe 45 and isadministered as above specified.

It is well known that, in cases of asphyxiation, the tongue of thepatient falls back into the throat and it is necessary to normally placethe same in order. to avoid strangulatlon and permit administration of aresuscitating fluid such as air and gas or gas alone, and as aconvenient means for holdmg the tongue a combined discharge nozzle andtongue depressor 87 is preferably secured to the end of each tube orpipe 63-. This combined nozzle and depressor consists of a flattenedtube 88, which is arched or convexed as at 89 and has a downwardlyprojecting curved free extremity 90 with outlets or openings 91 formedtherein for the free outlet or. liberationof the air, air and gas or gasalone into the throat of the patient. willbe noted that the openings oroutlet apertures 91 are. located adistance twin th ree lewev dly ben anda @25- 'iiio 48 is opened'and the auxiliary gas is per- 1 its tremity 90of the combined nozzle and depressor and that a number of these openingsare used, which will insure a liberation of the air or air and gas intothe throat of the patient. The arched formation of this combined nozzleand depressor will maintain the tongue of the patient in normalposition, the said arched portion of the nozzle conforming to thephysical contour of the tongue. While it is preferred to use thiscombined discharge nozzle and tongue depressor, it will be understoodthat the invention is not limited to the use of this preferred form ofdevice.

What is claimed as new is:

1. In a resuscitator or pulmotor of the class specified, means having aninlet for a gaseous medium and outlets for the delivery of such mediumto and its discharge from a patient, a pump connected to said inlet fordelivering gaseous medium to said receiving means, said pump having arotatable shaft, means comprising a reciprocating valve for alternatelyestablishing communication between the inlet and delivery outlet andbetween the delivery and discharge outlets of said receiving means,means including a worm wheel for reciprocating said valve, and aplurality of worms of different pitch mounted on the shaft of said pumpand selectively engageable with said worm wheel.

2. A resuscitator or pulmotor, comprising a rotary pump; a purifier toreceive a gaseous-medium from said pump; a casing having an inletconnected to said purifier, an

outlet for delivery of gaseous medium directly to a patient, and anoutlet to the atmosphere; a valve in said casing shiftable either intoposition to establish communication between said inlet and thefirst-named outlet or into position to establish communication betweensaid first and second-named outlets; a worm wheel associated with saidvalve and operable in its rotation to shiftsaid valve alternately intosaid two positions; and a plurality of worms of difierent pitch carriedby the shaft of the pump and selectively engageable with said wormwheel.

3. In a resuscitator or pulmotor of the class described, a pump, arotating shaft driven by said pump, a casing to receive gaseous mediumfrom said pump, said casing having a plurality of outlets for deliveryof gaseous medium to and its return from a plurality of separatepatients and an exhaust outlet, a reciprocating valve associated withsaid delivery and exhaust outlets for alternatively establishingcommunication between said casing and one of said delivery outlets andbetween one of said delivery outlets and said exhaust outlets, and meansoperable by said rotating shaft for reciprocating said valve at timedintervals,

said last named means being regulatable to vary the intervals betweenthe movements of said valve.

4. In a resuscitator or pulmotor of the class described, a casing toreceive a gaseous medium, said casing having a port for delivery of suchgaseous medium to and its return from a patient and also having a secondport for the discharge of the gaseous medium returned by the patient, apump for delivering gaseous medium to said casing, said pump having arotatable element, a reciprocatory valve operable first to close saidsecond port and open said first port and then to establish communicationbetween said first and second ports, means including a worm wheel forreciprocating said valve at timed intervals, and a member mounted on therotatable element of said pump and comprising a plurality of worms ofdifferent pitch, said member being adjustable on said rotatable elementto selectively bring said worms into mesh with said worm Wheel.

In testimony whereof I have hereunto set my hand.

DAVID N. LAMBERT.

